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<H3><A NAME="SECTION007265000000000000000"></A><A NAME="doctest-DocTestRunner"></A>
<BR>
5.2.6.5 DocTestRunner objects
</H3>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><span class="typelabel">class</span>&nbsp;<tt id='l2h-1100' xml:id='l2h-1100' class="class">DocTestRunner</tt></b>(</nobr></td>
  <td><var></var><big>[</big><var>checker</var><big>]</big><var></var><big>[</big><var>,
                                 verbose</var><big>]</big><var></var><big>[</big><var>, optionflags</var><big>]</big><var></var>)</td></tr></table></dt>
<dd>
    A processing class used to execute and verify the interactive
    examples in a <tt class="class">DocTest</tt>.

<P>
The comparison between expected outputs and actual outputs is done
    by an <tt class="class">OutputChecker</tt>.  This comparison may be customized
    with a number of option flags; see section&nbsp;<A href="doctest-options.html#doctest-options">5.2.3</A>
    for more information.  If the option flags are insufficient, then
    the comparison may also be customized by passing a subclass of
    <tt class="class">OutputChecker</tt> to the constructor.

<P>
The test runner's display output can be controlled in two ways.
    First, an output function can be passed to
    <tt class="method">TestRunner.run()</tt>; this function will be called with
    strings that should be displayed.  It defaults to
    <code>sys.stdout.write</code>.  If capturing the output is not
    sufficient, then the display output can be also customized by
    subclassing DocTestRunner, and overriding the methods
    <tt class="method">report_start</tt>, <tt class="method">report_success</tt>,
    <tt class="method">report_unexpected_exception</tt>, and <tt class="method">report_failure</tt>.

<P>
The optional keyword argument <var>checker</var> specifies the
    <tt class="class">OutputChecker</tt> object (or drop-in replacement) that should
    be used to compare the expected outputs to the actual outputs of
    doctest examples.

<P>
The optional keyword argument <var>verbose</var> controls the
    <tt class="class">DocTestRunner</tt>'s verbosity.  If <var>verbose</var> is
    <code>True</code>, then information is printed about each example, as it
    is run.  If <var>verbose</var> is <code>False</code>, then only failures are
    printed.  If <var>verbose</var> is unspecified, or <code>None</code>, then
    verbose output is used iff the command-line switch <b class="programopt">-v</b>
    is used.

<P>
The optional keyword argument <var>optionflags</var> can be used to
    control how the test runner compares expected output to actual
    output, and how it displays failures.  For more information, see
    section&nbsp;<A href="doctest-options.html#doctest-options">5.2.3</A>.

<P>

<span class="versionnote">New in version 2.4.</span>

</dl>

<P>
<tt class="class">DocTestParser</tt> defines the following methods:

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-1101' xml:id='l2h-1101' class="method">report_start</tt></b>(</nobr></td>
  <td><var>out, test, example</var>)</td></tr></table></dt>
<dd>
    Report that the test runner is about to process the given example.
    This method is provided to allow subclasses of
    <tt class="class">DocTestRunner</tt> to customize their output; it should not be
    called directly.

<P>
<var>example</var> is the example about to be processed.  <var>test</var> is
    the test containing <var>example</var>.  <var>out</var> is the output
    function that was passed to <tt class="method">DocTestRunner.run()</tt>.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-1102' xml:id='l2h-1102' class="method">report_success</tt></b>(</nobr></td>
  <td><var>out, test, example, got</var>)</td></tr></table></dt>
<dd>
    Report that the given example ran successfully.  This method is
    provided to allow subclasses of <tt class="class">DocTestRunner</tt> to customize
    their output; it should not be called directly.

<P>
<var>example</var> is the example about to be processed.  <var>got</var> is
    the actual output from the example.  <var>test</var> is the test
    containing <var>example</var>.  <var>out</var> is the output function that
    was passed to <tt class="method">DocTestRunner.run()</tt>.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-1103' xml:id='l2h-1103' class="method">report_failure</tt></b>(</nobr></td>
  <td><var>out, test, example, got</var>)</td></tr></table></dt>
<dd>
    Report that the given example failed.  This method is provided to
    allow subclasses of <tt class="class">DocTestRunner</tt> to customize their
    output; it should not be called directly.

<P>
<var>example</var> is the example about to be processed.  <var>got</var> is
    the actual output from the example.  <var>test</var> is the test
    containing <var>example</var>.  <var>out</var> is the output function that
    was passed to <tt class="method">DocTestRunner.run()</tt>.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-1104' xml:id='l2h-1104' class="method">report_unexpected_exception</tt></b>(</nobr></td>
  <td><var>out, test, example, exc_info</var>)</td></tr></table></dt>
<dd>
    Report that the given example raised an unexpected exception.
    This method is provided to allow subclasses of
    <tt class="class">DocTestRunner</tt> to customize their output; it should not be
    called directly.

<P>
<var>example</var> is the example about to be processed.
    <var>exc_info</var> is a tuple containing information about the
    unexpected exception (as returned by <tt class="function">sys.exc_info()</tt>).
    <var>test</var> is the test containing <var>example</var>.  <var>out</var> is the
    output function that was passed to <tt class="method">DocTestRunner.run()</tt>.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-1105' xml:id='l2h-1105' class="method">run</tt></b>(</nobr></td>
  <td><var>test</var><big>[</big><var>, compileflags</var><big>]</big><var></var><big>[</big><var>,
                        out</var><big>]</big><var></var><big>[</big><var>, clear_globs</var><big>]</big><var></var>)</td></tr></table></dt>
<dd>
    Run the examples in <var>test</var> (a <tt class="class">DocTest</tt> object), and
    display the results using the writer function <var>out</var>.

<P>
The examples are run in the namespace <code>test.globs</code>.  If
    <var>clear_globs</var> is true (the default), then this namespace will
    be cleared after the test runs, to help with garbage collection.
    If you would like to examine the namespace after the test
    completes, then use <var>clear_globs=False</var>.

<P>
<var>compileflags</var> gives the set of flags that should be used by
    the Python compiler when running the examples.  If not specified,
    then it will default to the set of future-import flags that apply
    to <var>globs</var>.

<P>
The output of each example is checked using the
    <tt class="class">DocTestRunner</tt>'s output checker, and the results are
    formatted by the <tt class="method">DocTestRunner.report_*</tt> methods.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-1106' xml:id='l2h-1106' class="method">summarize</tt></b>(</nobr></td>
  <td><var></var><big>[</big><var>verbose</var><big>]</big><var></var>)</td></tr></table></dt>
<dd>
    Print a summary of all the test cases that have been run by this
    DocTestRunner, and return a tuple "<tt class="samp">(<var>failure_count</var>,
    <var>test_count</var>)</tt>".

<P>
The optional <var>verbose</var> argument controls how detailed the
    summary is.  If the verbosity is not specified, then the
    <tt class="class">DocTestRunner</tt>'s verbosity is used.
</dl>

<P>

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	55	<H3><A NAME="SECTION007265000000000000000"></A><A NAME="doctest-DocTestRunner"></A>
	56	<BR>
	57	5.2.6.5 DocTestRunner objects
	58	</H3>
	59	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
	60	<td><nobr><b><span class="typelabel">class</span> <tt id='l2h-1100' xml:id='l2h-1100' class="class">DocTestRunner</tt></b>(</nobr></td>
	61	<td><var></var><big>[</big><var>checker</var><big>]</big><var></var><big>[</big><var>,
	62	verbose</var><big>]</big><var></var><big>[</big><var>, optionflags</var><big>]</big><var></var>)</td></tr></table></dt>
	63	<dd>
	64	A processing class used to execute and verify the interactive
65	examples in a <tt class="class">DocTest</tt>.
66
67	<P>
68	The comparison between expected outputs and actual outputs is done
69	by an <tt class="class">OutputChecker</tt>. This comparison may be customized
70	with a number of option flags; see section <A href="doctest-options.html#doctest-options">5.2.3</A>
71	for more information. If the option flags are insufficient, then
72	the comparison may also be customized by passing a subclass of
73	<tt class="class">OutputChecker</tt> to the constructor.
74
75	<P>
76	The test runner's display output can be controlled in two ways.
77	First, an output function can be passed to
78	<tt class="method">TestRunner.run()</tt>; this function will be called with
79	strings that should be displayed. It defaults to
80	<code>sys.stdout.write</code>. If capturing the output is not
81	sufficient, then the display output can be also customized by
82	subclassing DocTestRunner, and overriding the methods
83	<tt class="method">report_start</tt>, <tt class="method">report_success</tt>,
84	<tt class="method">report_unexpected_exception</tt>, and <tt class="method">report_failure</tt>.
85
86	<P>
87	The optional keyword argument <var>checker</var> specifies the
88	<tt class="class">OutputChecker</tt> object (or drop-in replacement) that should
89	be used to compare the expected outputs to the actual outputs of
90	doctest examples.
91
92	<P>
93	The optional keyword argument <var>verbose</var> controls the
94	<tt class="class">DocTestRunner</tt>'s verbosity. If <var>verbose</var> is
95	<code>True</code>, then information is printed about each example, as it
96	is run. If <var>verbose</var> is <code>False</code>, then only failures are
97	printed. If <var>verbose</var> is unspecified, or <code>None</code>, then
98	verbose output is used iff the command-line switch <b class="programopt">-v</b>
99	is used.
100
101	<P>
102	The optional keyword argument <var>optionflags</var> can be used to
103	control how the test runner compares expected output to actual
104	output, and how it displays failures. For more information, see
105	section <A href="doctest-options.html#doctest-options">5.2.3</A>.
106
107	<P>
108
109	<span class="versionnote">New in version 2.4.</span>
110
111	</dl>
112
113	<P>
114	<tt class="class">DocTestParser</tt> defines the following methods:
115
116	<P>
117	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
118	<td><nobr><b><tt id='l2h-1101' xml:id='l2h-1101' class="method">report_start</tt></b>(</nobr></td>
119	<td><var>out, test, example</var>)</td></tr></table></dt>
120	<dd>
121	Report that the test runner is about to process the given example.
122	This method is provided to allow subclasses of
123	<tt class="class">DocTestRunner</tt> to customize their output; it should not be
124	called directly.
125
126	<P>
127	<var>example</var> is the example about to be processed. <var>test</var> is
128	the test containing <var>example</var>. <var>out</var> is the output
129	function that was passed to <tt class="method">DocTestRunner.run()</tt>.
130	</dl>
131
132	<P>
133	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
134	<td><nobr><b><tt id='l2h-1102' xml:id='l2h-1102' class="method">report_success</tt></b>(</nobr></td>
135	<td><var>out, test, example, got</var>)</td></tr></table></dt>
136	<dd>
137	Report that the given example ran successfully. This method is
138	provided to allow subclasses of <tt class="class">DocTestRunner</tt> to customize
139	their output; it should not be called directly.
140
141	<P>
142	<var>example</var> is the example about to be processed. <var>got</var> is
143	the actual output from the example. <var>test</var> is the test
144	containing <var>example</var>. <var>out</var> is the output function that
145	was passed to <tt class="method">DocTestRunner.run()</tt>.
146	</dl>
147
148	<P>
149	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
150	<td><nobr><b><tt id='l2h-1103' xml:id='l2h-1103' class="method">report_failure</tt></b>(</nobr></td>
151	<td><var>out, test, example, got</var>)</td></tr></table></dt>
152	<dd>
153	Report that the given example failed. This method is provided to
154	allow subclasses of <tt class="class">DocTestRunner</tt> to customize their
155	output; it should not be called directly.
156
157	<P>
158	<var>example</var> is the example about to be processed. <var>got</var> is
159	the actual output from the example. <var>test</var> is the test
160	containing <var>example</var>. <var>out</var> is the output function that
161	was passed to <tt class="method">DocTestRunner.run()</tt>.
162	</dl>
163
164	<P>
165	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
166	<td><nobr><b><tt id='l2h-1104' xml:id='l2h-1104' class="method">report_unexpected_exception</tt></b>(</nobr></td>
167	<td><var>out, test, example, exc_info</var>)</td></tr></table></dt>
168	<dd>
169	Report that the given example raised an unexpected exception.
170	This method is provided to allow subclasses of
171	<tt class="class">DocTestRunner</tt> to customize their output; it should not be
172	called directly.
173
174	<P>
175	<var>example</var> is the example about to be processed.
176	<var>exc_info</var> is a tuple containing information about the
177	unexpected exception (as returned by <tt class="function">sys.exc_info()</tt>).
178	<var>test</var> is the test containing <var>example</var>. <var>out</var> is the
179	output function that was passed to <tt class="method">DocTestRunner.run()</tt>.
180	</dl>
181
182	<P>
183	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
184	<td><nobr><b><tt id='l2h-1105' xml:id='l2h-1105' class="method">run</tt></b>(</nobr></td>
185	<td><var>test</var><big>[</big><var>, compileflags</var><big>]</big><var></var><big>[</big><var>,
186	out</var><big>]</big><var></var><big>[</big><var>, clear_globs</var><big>]</big><var></var>)</td></tr></table></dt>
187	<dd>
188	Run the examples in <var>test</var> (a <tt class="class">DocTest</tt> object), and
189	display the results using the writer function <var>out</var>.
190
191	<P>
192	The examples are run in the namespace <code>test.globs</code>. If
193	<var>clear_globs</var> is true (the default), then this namespace will
194	be cleared after the test runs, to help with garbage collection.
195	If you would like to examine the namespace after the test
196	completes, then use <var>clear_globs=False</var>.
197
198	<P>
199	<var>compileflags</var> gives the set of flags that should be used by
200	the Python compiler when running the examples. If not specified,
201	then it will default to the set of future-import flags that apply
202	to <var>globs</var>.
203
204	<P>
205	The output of each example is checked using the
206	<tt class="class">DocTestRunner</tt>'s output checker, and the results are
207	formatted by the <tt class="method">DocTestRunner.report_*</tt> methods.
208	</dl>
209
210	<P>
211	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
212	<td><nobr><b><tt id='l2h-1106' xml:id='l2h-1106' class="method">summarize</tt></b>(</nobr></td>
213	<td><var></var><big>[</big><var>verbose</var><big>]</big><var></var>)</td></tr></table></dt>
214	<dd>
215	Print a summary of all the test cases that have been run by this
216	DocTestRunner, and return a tuple "<tt class="samp">(<var>failure_count</var>,
217	<var>test_count</var>)</tt>".
218
219	<P>
220	The optional <var>verbose</var> argument controls how detailed the
221	summary is. If the verbosity is not specified, then the
222	<tt class="class">DocTestRunner</tt>'s verbosity is used.
223	</dl>
224
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